Paul buys 0.5 kg of grapes and 0.6 kg of apples. The total cost is £3.12

Work out the cost of 1 kg of grapes.

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Write a corresponding real world problem to represent 2x - 125=400

I’m still confused on how to work the percentages